<template>
  <div id="app">
    <form action="#" v-show="tiShow">
      <h1>新增商品</h1>
      <div>
        <label>品牌名称:</label>
        <input type="text" v-model="name"/>
      </div>
      <div>
        <label>创立时间:</label>
        <input type="text" v-model="time"/>
      </div>
      <div>
        <button @click="add">确定提交</button>
      </div>
    </form>
    <button class="btn" @click="tiShow=!tiShow">{{tiShow?'收起表单':'展开表单'}}</button>
    <table class="tb">
      <tr>
        <th>编号</th>
        <th>品牌名称</th>
        <th>创立时间</th>
        <th>操作</th>
      </tr>
      <!-- 循环渲染的元素tr -->
      <tr v-for="item in list" :key="item.id" >
        <td>{{item.id}}</td>
        <td>{{item.name }}</td>
        <td>{{ item.time }}</td>
        <td>
          <button @click="del(item.id)">删除</button>
        </td>
      </tr>
      <tr>
        <td colspan="4" v-show="isShow">没有数据咯~</td>
      </tr>
    </table>
  </div>
</template>
<script>
export default {
  data() {
    return {
      list: [
        {
          id: '',
          name: '',
          time:''
        },
      ],
      name:'',
      time:'',
      isShow:false,
      tiShow:true,

    }
  },
  methods: {
    del(id) {
      this.list = this.list.filter((item) => item.id !== id)
      if(this.list.length<=0){
        this.isShow=true
      }
    },
    add() {
      this.list.push({
        id: this.list.length + 1,
        name: this.name,
        time:this.time
      })
      if(this.list.length>0){
        this.isShow=false
      }
      this.name=''
      this.time=''
    },
  },
}
</script>
<style>
#app {
  width: 600px;
  margin: 10px auto;
}
.btn {
  border: 1px solid #ccc;
  margin-bottom:10px;
  margin-top:40px;
}

.tb {
  border-collapse: collapse;
  width: 100%;
}

.tb th {
  background-color: #0094ff;
  color: white;
}

.tb td,
.tb th {
  padding: 5px;
  border: 1px solid black;
  text-align: center;
}

.add {
  padding: 5px;
  border: 1px solid black;
  margin-bottom: 10px;
}
</style>